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For the Inventor, By the Inventor

Yokohama, Japan

Kazuyo Umezawa

This inventor holds 53 USPTO granted patents and 5 published patent applications and 3 EPO patents, primarily in Optical Recording Medium. Top assignee: Kabushiki Kaisha Toshiba. Active years: 2009-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuyo Umezawa. Retrieved from https://idiyas.com/inventor/kazuyo-umezawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 53 

% Patents Active = 73.6

 

Average Co-Inventor Count = 5.6

ph-index = 2

Forward Citations = 22(Granted Patents)

Forward Citations (Not Self Cited) = 9(Dec 10, 2025)


Location History:

  • Yokohama, JP (2009 - 2013)
  • Tokyo, JP (2014)

Company Filing History:

goldMedal53 out of 53,276 
 
Kabushiki Kaisha Toshiba
 patents

Years Active: 2009-2014

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Areas of Expertise:
Optical Recording
Information Recording
Reproducing Method
Storage Medium
Pattern Transfer
Magnetic Recording
Multi-Layer Disc
405nm Laser
Stamper Evaluation
Ultraviolet-Curing Resin
Data Writing
Linear Velocity
53 patents (USPTO):Explore Patents
1. 8717858 - Write-once type information storage medium (disk structure of recording type information storage medium having structure in which recording layer formed on transparent susbstrate is defined as inside), and information reproducing method or information recording method as well as storage medium manufacturing (2014-05-06),
2. 8593930 - Optical recording medium, information recording method, and information reproducing method (2013-11-26),
3. 8588047 - Storage medium, reproducing method, and recording method (2013-11-19),
4. 8551685 - Ultraviolet-curing resin material for pattern transfer and magnetic recording medium manufacturing method using the same (2013-10-08),
5. 8531936 - Storage medium, reproducing method, and recording method (2013-09-10),
6. 8509049 - Optical recording medium having intermediate layer of prescribed thickness and thickness range for use with 405nm laser (2013-08-13),
7. 8454869 - Stamper and stamper evaluation method (2013-06-04),
8. 8437242 - Optical recording medium for writing data using multiple pulses (2013-05-07),
9. 8422353 - Optical recording medium for writing data using multiple pulses (2013-04-16),
10. 8374069 - Storage medium, reproducing method, and recording method (2013-02-12),
11. 8372575 - Ultraviolet-curing resin material for pattern transfer and magnetic recording medium manufacturing method using the same (2013-02-12),
12. 8355306 - Optical recording medium, information recording method, and information reproducing method (2013-01-15),
13. 8339916 - Optical recording medium, information recording method, and information reproducing method (2012-12-25),
14. 8325584 - Storage medium, reproducing method, and recording method (2012-12-04),
15. 8310913 - Optical recording medium capable of using wide ranges of linear velocity recording (2012-11-13),

Title: Kazuyo Umezawa: Pioneering Female Inventor from Yokohama

Introduction: Kazuyo Umezawa is a trailblazing inventor hailing from Yokohama, Japan, known for her innovative contributions to various fields.

Latest Patents: Kazuyo Umezawa holds several patents in the areas of sustainable energy solutions, advanced robotics, and medical devices, showcasing her diverse range of expertise.

Career Highlights: With a background in engineering and a passion for problem-solving, Umezawa has led groundbreaking projects that have revolutionized industries and improved the quality of life for many.

Collaborations: Throughout her career, Kazuyo Umezawa has collaborated with leading research institutions, universities, and companies worldwide, fostering a culture of innovation and knowledge-sharing.

Conclusion: Kazuyo Umezawa's dedication to pushing the boundaries of technology and her commitment to creating a better future through her inventions make her a true inspiration in the world of innovation.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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